Improvement in printing-telegraphs



. iZ-Sheets--Sheetl' i). P. HUMSTON,

Improvement in Printing-Tlegraph-s.

zsheefSf-sheerz.

J. P. HUNIASTON.

`Improvement in Printing-Telegraphs.

N0. 128,627, Patentedluly2,f872.

4M. Moro-ur/as/up/-lle ca. MYJassoRA/rs Mauss) UNITED STATES PATENT OFFICE.

JOHN P. HUMAsTON, Or'NEw YORK, AssIGNOR To EDWARD A. OALAHAN,

on BROOKLYN, N. Y.

IMPROVEMENT IN PRINTING-TELEGRAPHS.

Specification forming part of Letters Patent No. 128,627, dated July 2, 1872.

withdrawn at the transmitting-station and a circuit broken, so that the unison at the receiving-instrument is withdrawn; thereby both type-wheels start and rotate together. The type-wheel at the transmitting-station is stopped by the finger-key mechanism, that also'is al circuit-closer that throws the electric current through the magnet of the receiving instrument, the armature of which moves the impression-pad` and also the unison so that the letter is printed and thetypewheel also stopped. On releasing the ngerkey the wheels revolve around to the unisonpoint and stop, or else they revolve until stopped by the depression of another key. By this means the keys can be manipulated with great rapidity, because the unison-stop is only operative when a finger-key is not depressed.

. In the drawing, Figure l, is a vertical section of the machine. Fig. 2 is a plan of the type-wheel and printing mechanism; and Fig. 3 is a plan of the circuit-closing mechanism.

The type-wheel a is upon a vertical shaft, b, driven by competent power, there being a friction-clutch at a that allows the shaft b to continue its motion when the type-wheel a is stopped. A ratchet-wheel, o, is connected to the type-wheel a by a sleeve, so as to move with it, and a stop, t, projecting from this wheel, corresponds with the blank of the type-wheel. Around the insulated ring d is a` circular range of circuit-closing pins, e, that,in a normal position, are drawn below the surface of d. Each pin is connected with itsappropriate key in the range of keys by any convenient mechanism. I have shown springs to project the bolts, and cords connected with the keys to draw them down,` so that when a key is struck its pin will rise up from the ring d and stop varm t' and pin e.

the arm t' and type-wheel with the corresponding letter in position for printing.

The line-wire d is connected with d, and the batterywire f is connected vwith the shaft b. These being insulated from each other the pulsation can only reach the line through the This pulsation acts in the magnet g at the distant station, either direct or through a relay. It may also act at the transmitting-station in the same magnet, so as to print the message at both ends of the line. The electro-magnet g has an armature, h, and lever h', carrying the printing-pad k, that forces the paper (from the reel Z) against the type. Thefeed of the paper may be effected in any convenient manner. I have shown the roller m with serrated edge, the spring holding-roller a, and a ratchet-wheel, fn', and pawl acted upon by the arm o from the printinglever h.

Upon reference to Fig. 4, which is a plan in enlarged size of the stop t and parts operating with it, it will be seen that on the printinglever l1. there is a dog, r, and that on the arm is Van inclined stud, 3, and that the end of the dog 1' forms a stop to the teeth of o, and that there is a downward inclined projection, 7, on r, adjacent to the stud 3. The pin s, in the vrange of pins, forms the unison-bolt. This unison bolt s, in the normal position, is elevated so that the arm t' cannot pass it, but the same is connected so that it is withdrawn by depressing either of the linger-keys. The mechanism shown for effecting this is the lever p, rocking-frame q, and bar 6, over the range of. iinger-keys, so that the lever p is moved and the unison-bolt s withdrawn simultaneously with the projection of the pin, of the range of pins e, that is thrown up by the depression of the given key.

At the transmitting-station the magnet g may be entirely out of action, and the stop t swunggaround into the position shown by dotted lines in Fig. 3, so that the impression-lever and its parts may be entirely out of the way, andthe lever h cannot close the circuit when this stop t is thrown back, because the plate t is of non-conducting material, or insulated.

The transmitting is mechanical. Suppose the arm t' to be stopped by the unison-bolt, the circuit to the distant station being completed through the same, upon striking a nger-key this unison-bolt is withdrawn, the circuit broken, the `type-Wheels revolve by synchronous movements until the type-Wheel at the transmitting-station is arrested by the pin in the range e, that has been simultaneously elevated upon striking the linger-key. This contact closes the circuit to the distant station, and the circuit remains closed, and both type- Wheels stopped until the finger-key is released, Whether that be a longer or shorter period. A second finger-key may be depressed before the iirst is liberated, in which case the unisonbolt is still held down, and upon liberating the first key the circuit through its pin is broken, and the type-Wheels are simultaneously revolved until the arm t' comes in contact with the pin of the range that has been elevated by the second key, and the circuit is again closed and the type-Wheels stopped, and so on 5 or, if the finger-keys are unacted upon, the arm t' comes into contact with the unison-pin s and stops, and the circuit remains closed until another key is operated.

At the receiving-station the unison-bolt has to be Withdrawn by any suitable mechanism, as the dog r, being under the control of the magnet g, forms the unison-stop. The electric circuit being closed at the transmitting-station through the unison-bolt s, the end of the dog r at the receiving-station rests against the tooth 10 of the Wheel c, and prevents the type- Wheel rotating. The moment the circuit is broken and the magnetic energy ceases the dog r falls back and the type-Wheel revolves. When the circuit is again closed at the transmitting-station the magnet g brings up the printing-lever at the receiving-station, giving the impression and simultaneously holding the type-Wheel by the dog?A against the corresponding tooth of the Wheel c. This operation will take place whenever the circuit is closed, and in arresting the type-Wheel at unison, the stud 3 of the arm i at the receiving-station comes into Contact with the projection 7 on r and arrests the movement slightly before the arm i' at the transmitting station arrives at the unison-bolt s; hence, when the circuit is closed by the last-named contact, the dogris moved by the magnet releasing 3 and 7 and holding the type-Wheel by the end of the dog against the tooth 10, as before.

By a unison-key acting only to Withdraw the bolt s and break the circuit long enough for the type-wheel at the transmitter to make more than one revolution, all the machines in the electric circuit will be stopped by thecontact of 3 and 7, and resume their normal and unison-position as the circuit is again closed through s.

The connections to bring in a relay when used at either the transmitting or receiving station are of the usual character. The inking-roller w and paper guide x are of usual character.-

Any number of instruments in an electric circuit can be operated simultaneously; only one Wire is required; and unison is instantly obtained in all the instruments should any get out of time.

If at any one of the receiving-instruments in the line the attendant notices that the 'spelling is Wrong he can bring his and all other instruments in the line into unison by breaking the circuit by a switch or otherwise for a vshort period--say one or two seconds-and the operator at the transmitting-station learning by his magnet or a sounder that the line is inoperative, repeats Whatever may be necessary.

I claim as my invention- 1. A type-wheel revolved by a frictional clutch and a stop, i, arrested and detained While the key is depressed, substantially as lset forth.

2. A type-Wheel revolved by friction and a stop, in combination with a circular range of pins, controlled by keys that stop the type- Wheel of the transmitting -instrument, and also close or break the electric circuit to the distant instrument, substantially as set forth.

3. A unison-bolt to arrest the movement of the type-Wheel and control the electric circuit, in combination with a range of linger-keys that act upon the said unison-stop as Well as the type-Wheel stops, substantially as set forth.

4. The type-Wheel a and wheel c, in combination with an electro-magnet printing lever and dog, that simultaneously give the impression and hold the type-wheel until released by the electro-magnet, substantially as set forth. g l

5. The unison-bolt, in combination with a range of finger-keys and stops to arrest the movement of the type-Wheel, substantially as set forth, so that the unison-bolt is removed by either finger-key simultaneously With the movement by that key of its type-Wheel stop, substantially as set forth.

6. A series of keys and a circular range of stop-pins connected by cords, in combination with the type-Wheel and impression mechanism, substantially as set forth.

7. A printing-lever provided With a stop that arrests and holds the type-wheel, substantially as set forth.

8. A printing-lever provided with an impression-pad, a stop for the type-Wheel, and a connection to the feeding mechanism, substantially as set forth, in combination With one electro-magnet for operating said parts, substantially as set forth.

` 9. The printing-pad, the type-Wheel stop, and the unison device, actuated by one electro-magnet, substantially as set forth.

Signed by me this 22d day of April, A. D. 

